Vérification du proxy en Java

Question

Vérification du proxy en Java

J'essaie de vérifier si un proxy est en ligne ou pas. Mais chaque fois qu'une exception est levée. Je l'ai également essayé avec System.setProperty (), mais cela ne fonctionne pas non plus...

Ma méthode:

public static boolean isOnline(String host, int port)
{
    String url = "http://www.google.com";
    try
    {
        Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(host, port));
        HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection(proxy);
        connection.connect();
        return true;

    } catch (Exception e)
    {
        return false;
    }
}

L'exception:

java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient$1.run(HttpClient.java:484)
at sun.net.www.http.HttpClient$1.run(HttpClient.java:482)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.http.HttpClient.privilegedOpenServer(HttpClient.java:481)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:522)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
at sun.net.www.http.HttpClient.New(HttpClient.java:308)
at sun.net.www.http.HttpClient.New(HttpClient.java:326)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1167)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1146)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:997)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:931)
at viewer.ProxyCheck.isOnline(ProxyCheck.java:18)
at viewer.Viewer.main(Viewer.java:7)

Merci pour votre temps!

1

French java proxy url connection

Author: Leon, 2014-11-19

Source

1 answers

score 1 · Accepted Answer

Essayez ceci:

public static boolean isOnline(){
    System.setProperty("http.proxyHost", "failProxyIP");
    System.setProperty("http.proxyPort", "failProxyPort");
    try {
        HttpURLConnection connection = (HttpURLConnection)new URL("http://www.google.com").openConnection();
        connection.connect();
        return true;
    } catch (Exception e) {
        return false;
    }
}

public static void main(String[] args) {
    System.out.println(isOnline()); //prints false
}